function s1_hello() {
	echo "hello, world!"
}
function s2_tell_who_i_am(){
	whoami
}
function s3_which_distro_do_i_use(){
	awk -F'"' '/^PRETTY_NAME=/{gsub(/ [0-9].*/,"",$2); print "NAME=\"" $2 "\""}' /etc/os-release
}
function s4_view_my_cpu_arch(){
	uname -m
}
function s5_show_first_scsi_disk_size(){
	lsblk -l | awk ' /disk/{size=$4; if (size ~ /T/) {gsub(/T/, "", size); print size*1000} else {gsub(/G/ , "", size); print size}}' | head -n 1
}
function s6_show_main_memory_size_in_megabytes(){
	free -m |grep "Mem:"|awk '{print $2}'
}
